Grammica AI Detector

One record in the studies index tested the tool. Walters 2023 ran Grammica between June 25 and July 12, 2023 on 42 ChatGPT-3.5 literature reviews, 42 ChatGPT-4 literature reviews and 42 human-written first-year composition papers. Table 4 prints 86% of the 126 documents correct, 11% incorrect and 3% uncertain; on the 84 AI papers 81% correct and 17% called human; 100% of the GPT-3.5 papers correct; 62% of the GPT-4 papers correct with 33% called human; and on the 42 human papers 95% correct, 0 called AI and 5% uncertain (DOI 10.1515/opis-2022-0158, Table 4, read 8 November 2026). Only Copyleaks, Turnitin, Originality.ai, Scribbr and ZeroGPT scored higher overall, and the paper's text puts Grammica at the ceiling of its second group: "the other detectors have a maximum rate of 17%" on false negatives.

The fields follow the index rules. Both ranked error values stay empty: Table 4 prints 0 of 42 human papers called AI and 17% of 84 AI papers called human for Grammica (DOI 10.1515/opis-2022-0158, read 8 November 2026), but the study record names no per-tool figure for it in either direction, and the rule for this wave takes a Walters value only where the record prints one. The data file carries both Table 4 figures in the field bases so a merge can rank them. Grammica's 2023 pattern was the common one for that year: near-perfect on ChatGPT-3.5 and human papers, and one GPT-4 paper in three waved through.

Grammica ranks on one study record in independently tested detectors and at one named generator in generator models named, read in the data file on 10 November 2026. It appears in the GPT-4 question at 62% of 42 GPT-4 papers and on which AI detectors were shut down, where the two home page captures that bracket its removal are dated. It does not appear in the free tier, input limit, language, retention or claim gap rankings, because the vendor published no quota, no limit, no language, no period for the detector and no accuracy figure.

Every detector card on the register shows Grammica with the same fields as the live tools, so a reader who meets a 2023 or 2025 Grammica "Real" or "Fake" score can see what the one study measured.